In Japan, Kōshien (甲子園) generally refers to the two annual baseball tournaments played by high schools nationwide culminating at a final showdown at Hanshin Kōshien Stadium in Nishinomiya, Hyogo, Japan. They are organized by the Japan High School Baseball Federation in association with Mainichi Shimbun for the National High School Baseball Invitational Tournament in the spring and Asahi Shimbun for the National High School Baseball Championship in the summer.

Touch is a Japanese high school baseball manga series written and illustrated by Mitsuru Adachi. It was serialized in Shogakukan's Weekly Shōnen Sunday from 1981 to 1986, with its chapters were collected into 26 tankōbon volumes.